Candidate: Marzie Sadat Mirmohammad Meiguni
Date: October 20, 2025
Time: 12:30pm
Location: Online
Supervisor: Dr. Sahar Pirooz Azad
All are welcome!
Abstract:
This seminar presents an overview of the dynamic performance and control interactions of grid-forming inverters (GFMIs). The presentation will begin with an introduction to GFMIs and their key differences from grid-following inverters (GFLIs), highlighting the role of GFMIs in future low-inertia power systems. The main focus will be on analyzing internal control loop interactions in GFMIs operating under droop and virtual synchronous machine (VSM) control schemes, and how these interactions affect the small-signal stability of the system. As part of this analysis, a method for mitigating the adverse effects of these interactions on system small-signal stability is proposed, which does not require any modification to the existing control structures. A similar analysis will be presented for the dispatchable virtual oscillator control (dVOC) scheme, in addition to investigating its impact on setpoint tracking and transient response. In the second part of the seminar, the results of external control loop interactions analysis among parallel GFMIs using droop and VSM control schemes will be presented, focusing on how these interactions influence setpoint tracking performance and transient behavior. The findings aim to improve understanding of the dynamic behavior of GFMIs and guide the design of more robust control strategies for inverter-dominated grids.